PC28F128P33T85A NUMONYX, PC28F128P33T85A Datasheet - Page 64

• Manufacturer Part Number: PC28F128P33T85A
• Description: IC FLASH 128MBIT 85NS 64EZBGA
• Manufacturer: NUMONYX
• Series: StrataFlash™r

Specifications of PC28F128P33T85A

• Format - Memory: FLASH
• Memory Type: FLASH
• Memory Size: 128M (8Mx16)
• Speed: 85ns
• Interface: Parallel
• Voltage - Supply: 2.3 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TBGA
• Cell Type: NOR
• Density: 128Mb
• Access Time (max): 85ns
• Interface Type: Parallel/Serial
• Boot Type: Top
• Address Bus: 23b
• Operating Supply Voltage (typ): 2.5/3.3V
• Operating Temp Range: -40C to 85C
• Package Type: EZBGA
• Sync/async: Async/Sync
• Operating Temperature Classification: Industrial
• Operating Supply Voltage (min): 2.3V
• Operating Supply Voltage (max): 3.6V
• Word Size: 16b
• Number Of Words: 8M
• Supply Current: 28mA
• Mounting: Surface Mount
• Pin Count: 64
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 888065; 888065; PC28F128P33T85 888065

11.4.5
11.4.6
11.4.6.1
11.4.6.2
11.4.6.3
Datasheet
64
Security Modes
The device features security modes used to protect the information stored in the flash
memory array. The following sections describe each security mode in detail.
Block Locking
Individual instant block locking is used to protect user code and/or data within the flash
memory array. All blocks power up in a locked state to protect array data from being
altered during power transitions. Any block can be locked or unlocked with no latency.
Locked blocks cannot be programmed or erased; they can only be read.
Software-controlled security is implemented using the Block Lock and Block Unlock
commands. Hardware-controlled security can be implemented using the Block Lock-
Down command along with asserting WP#. Also, V
inhibit program and erase operations (see
page 62
The Numonyx™ StrataFlash
defined areas in the main array that can be configured as One-Time Programmable
(OTP) for the highest level of security. These include the four 32 KB parameter blocks
together as one and the three adjacent 128 KB main blocks. This is available for top or
bottom parameter devices.
Lock Block
To lock a block, issue the Lock Block Setup command. The next command must be the
Lock Block command issued to the desired block’s address (see
Command Bus Cycles” on page 44
page
Lock Setup command, the device configures the RCR instead.
Block lock and unlock operations are not affected by the voltage level on V
lock bits may be modified and/or read even if V
Unlock Block
The Unlock Block command is used to unlock blocks (see
Command Bus Cycles” on page
erased. Unlocked blocks return to a locked state when the device is reset or powered
down. If a block is in a lock-down state, WP# must be deasserted before it can be
unlocked (see
Lock-Down Block
A locked or unlocked block can be locked-down by writing the Lock-Down Block
command sequence (see
Blocks in a lock-down state cannot be programmed or erased; they can only be read.
However, unlike locked blocks, their locked state cannot be changed by software
commands alone. A locked-down block can only be unlocked by issuing the Unlock
Block command with WP# deasserted. To return an unlocked block to locked-down
state, a Lock-Down command must be issued prior to changing WP# to V
down blocks revert to the locked state upon reset or power up the device (see
Figure 31, “Block Locking State Diagram” on page
75). If the Set Read Configuration Register command is issued after the Block
and
Section 11.4.4, “Erase Protection” on page
Figure 31, “Block Locking State Diagram” on page
Section 9.6, “Device Command Bus Cycles” on page
®
Embedded Memory (P33) device also offers four pre-
44). Unlocked blocks can be read, programmed, and
and
Figure 39, “Block Lock Operations Flowchart” on
Section 11.3.6, “Program Protection” on
Numonyx™ StrataFlash
PP
is at or below V
PP
65).
data security can be used to
63).
Section 9.6, “Device
®
Section 9.6, “Device
Embedded Memory (P33)
65).
PPLK
Order Number: 314749-05
.
IL
PP
November 2007
. Locked-
. The block
44).